[Qemu-devel] QEMU 0.9.1 CPU halting with Windows 2000 Pro guest

[Qemu-devel] QEMU 0.9.1 CPU halting with Windows 2000 Pro guest

[Naram Qashat]

I've been having a recurring problem with running Windows 2000 Professional as a 
guest within QEMU 0.9.1 under FreeBSD (both 6.3 and 7.0).  The only programs 
that run in the foreground are mIRC and SciTE.  In the background, I've got 
Dimension 4, DAEMON Tools, O&O Defrag, and AVG running.

While it seems to happen at random, the CPU will halt, and by that I mean that 
Windows will look frozen, but QEMU keeps running, and going to the console via 
CTRL+ALT+2 and doing 'info cpus' shows that CPU #0 is halted.  At first, I 
thought that the problem was related to sounds playing, but after shutting down 
almost all sounds, the problem still occurs.  Usually it happens when I'm away 
from the computer, so I don't know the exact reason for the freeze.

If there is a way to do a debug of some sort while QEMU is running, that would 
probably help me narrow down what is causing the problem.  Any other help would 
be greatly appreciated.

Thank you,
Naram Qashat

Re: [Qemu-devel] QEMU 0.9.1 CPU halting with Windows 2000 Pro guest

[Mulyadi Santosa]

HI

On Wed, Apr 9, 2008 at 11:49 PM, Naram Qashat <cyberbotx@cyberbotx.com> wrote:
> I've been having a recurring problem with running Windows 2000 Professional
> as a guest within QEMU 0.9.1 under FreeBSD (both 6.3 and 7.0).

probably you hit same problem reported by other users about couple
days ago...the suspect is kqemu IIRC.

regards,

Mulyadi.

Re: [Qemu-devel] QEMU 0.9.1 CPU halting with Windows 2000 Pro guest

[Naram Qashat]

Mulyadi Santosa wrote:
> HI
> 
> On Wed, Apr 9, 2008 at 11:49 PM, Naram Qashat <cyberbotx@cyberbotx.com> wrote:
>> I've been having a recurring problem with running Windows 2000 Professional
>> as a guest within QEMU 0.9.1 under FreeBSD (both 6.3 and 7.0).
> 
> probably you hit same problem reported by other users about couple
> days ago...the suspect is kqemu IIRC.

I looked through the archives for the last week or so and I can't seem to find 
the thread in question.  Could you either point me to the thread or sum it up 
for me?

> regards,
> 
> Mulyadi.


Thanks,
Naram Qashat

Re: [Qemu-devel] QEMU 0.9.1 CPU halting with Windows 2000 Pro guest

[Mulyadi Santosa]

Hi...

On Fri, Apr 11, 2008 at 8:04 AM, Naram Qashat <cyberbotx@cyberbotx.com> wrote:
>  I looked through the archives for the last week or so and I can't seem to
> find the thread in question.  Could you either point me to the thread or sum
> it up for me?

hm...try :
http://lists.gnu.org/archive/html/qemu-devel/2008-04/msg00101.html

regards,

Mulyadi.

Re: [Qemu-devel] QEMU 0.9.1 CPU halting with Windows 2000 Pro guest

[Naram Qashat]

Mulyadi Santosa wrote:
> Hi...
> 
> On Fri, Apr 11, 2008 at 8:04 AM, Naram Qashat <cyberbotx@cyberbotx.com> wrote:
>>  I looked through the archives for the last week or so and I can't seem to
>> find the thread in question.  Could you either point me to the thread or sum
>> it up for me?
> 
> hm...try :
> http://lists.gnu.org/archive/html/qemu-devel/2008-04/msg00101.html

Ah, I did see that one, but it's not the same issue I'm running in to.  I am 
able to exit QEMU just fine without the process hanging.  It's just that it 
halts the actual emulated CPU and I can't see a reason why.  When I was running 
FreeBSD 6.3, I was running a UP kernel, and with FreeBSD 7.0, I'm running an SMP 
kernel, but the issue was the same with both versions.  I don't recall if it 
used to happen before, but I believe it may have started with QEMU 0.9.0, but 
don't quote me on that, I may be wrong.

> regards,
> 
> Mulyadi.

Thanks,
Naram Qashat

Re: [Qemu-devel] QEMU 0.9.1 CPU halting with Windows 2000 Pro guest

[Naram Qashat]

Naram Qashat wrote:
> Mulyadi Santosa wrote:
>> Hi...
>>
>> On Fri, Apr 11, 2008 at 8:04 AM, Naram Qashat 
>> <cyberbotx@cyberbotx.com> wrote:
>>>  I looked through the archives for the last week or so and I can't 
>>> seem to
>>> find the thread in question.  Could you either point me to the thread 
>>> or sum
>>> it up for me?
>>
>> hm...try :
>> http://lists.gnu.org/archive/html/qemu-devel/2008-04/msg00101.html
> 
> Ah, I did see that one, but it's not the same issue I'm running in to.  
> I am able to exit QEMU just fine without the process hanging.  It's just 
> that it halts the actual emulated CPU and I can't see a reason why.  
> When I was running FreeBSD 6.3, I was running a UP kernel, and with 
> FreeBSD 7.0, I'm running an SMP kernel, but the issue was the same with 
> both versions.  I don't recall if it used to happen before, but I 
> believe it may have started with QEMU 0.9.0, but don't quote me on that, 
> I may be wrong.
> 
>> regards,
>>
>> Mulyadi.
> 
> Thanks,
> Naram Qashat
> 
I narrows down the problem to be related to the use of kqemu.  Based on a 
suggestion from the maintainer of the FrreBSD port of QEMU, turning off kqemu 
support did stop QEMU from locking up like it was, although it obviously has the 
side-effect of making the emulation run a lot slower.  I can deal with that for 
now, but I suppose this just means that it's a kqemu problem and not a QEMU problem.

Thanks,
Naram Qashat

Re: [Qemu-devel] QEMU 0.9.1 CPU halting with Windows 2000 Pro guest

[Mulyadi Santosa]

Hi...

On Fri, Apr 18, 2008 at 1:50 AM, Naram Qashat <cyberbotx@cyberbotx.com> wrote:
>  I narrows down the problem to be related to the use of kqemu.  Based on a
> suggestion from the maintainer of the FrreBSD port of QEMU, turning off
> kqemu support did stop QEMU from locking up like it was, although it
> obviously has the side-effect of making the emulation run a lot slower.  I
> can deal with that for now, but I suppose this just means that it's a kqemu
> problem and not a QEMU problem.

Glad you can finally pin point the problem. I also learn something
from your discovery too. Thanks for sharing...

regards,

Mulyadi.